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    • Prius low battery symptoms. when the battery get old.

  • Prius low battery symptoms Apr 27, 2025 · Signs like fainting, dizziness, fatigue, or irregular heartbeats could indicate that your pacemaker battery is running low, and it’s important to consult with your healthcare provider immediately if you experience any of these symptoms. To my knowledge you can't get one from Walmart yet. Jun 2, 2022 · So, if you're worried that you may have a low battery, this is the first place you should check. " The first winter I had my 2004, the 10-15 minute commute at -40, constant use of headlights, Max Heat, and constant electric defrost, all dragged the 12 vdc battery down enough to cause weird problems. Experts say these signs often mean bigger battery problems are coming. Because the Prius is a hybrid, it relies Sep 17, 2017 · Unplug the 12v + battery post then the -, wait for 5 minutes then plug + first and - last. Mar 4, 2023 · Besides the low 12V battery Prius, a failed battery can make the Prius engine not start due to the high battery voltage. The car won't start and the lights on the dash will be wrong but you won't quite know what's different, or what the different lights mean. When starting, the screen says the 12V battery was low. May 27, 2004 · Your post has classic symptoms of a low 12 vdc bus, especially the warning about "park pawl abnormal. That and if the 12 volt battery ever needed a jump it's pretty much done. 5. Here are 5 major Prius hybrid battery failure symptoms: 1. 12 volt battery replaced 3 weeks ago. Maybe with Prius, it is bit more difficult to spot the difference. Mileage only gives a loose estimate of battery life by guessing the charge cycles and depth, but that would vary extremely based on driving style, speed, a/c use, and city driving. The car won’t start 2. The key battery is what allows you to unlock and start your car. The 12V battery helps keep the entire electrical system working even when parking. The ICE came on for a few cycles in that time. What the Hybrid Battery Does The hybrid battery is a series of battery modules made up of individual cells, similar to an AA battery. However, several things can cause problems with the charging system and the battery is only as good as its charge. 9v, on the low end and definitely way below what PriusChat is saying. 6 is extremely low for a 12 volt battery. After checking for codes first time no code. A low current 'Jump Source' cannot supply the necessary current to boot up the car while loaded with a near-dead battery. Oct 25, 2019 · Your battery should discharge at a steady and predictable rate. The dead 12V Toyota Prius battery is also another cause. Elearnaid indicates 11. If you want to see this coming a little in advance, and think about a battery replacement quicker with a scheduled appt at toyota, you might get a BM2 device and monitor the resting voltage of the battery with a phone app often at the beginning of the day (after the battery has been resting over night) and before putting the Sep 2, 2010 · Your Prius has (at least) 3 batteries, with different symptoms. The Key unlocked the door normally, which is good. Basicly dead. If the battery is completely dead, then a jumpstart should be your first course of action. So yesterday my son helped take the battery out and drop it off at AutoZone to be charged. Start car and see if the code slip indicator dissapear. Your 12-volt Prius battery is faulty if the state of charge erratically changes, such as depleting faster than expected or suddenly increasing. Low coolant levels can cause overheating, mimicking the symptoms of a failing pump. I saw it on mine when the oem battery died after 7 years. Jul 4, 2013 · The SKS will stop working or barely work, or just work once. If you are over 175k miles and live in a hot climate, its days are numbered. What Risks Are Involved in Ignoring a Weak Prius Battery? Ignoring a weak Prius battery poses several risks, including potential breakdown, reduced fuel efficiency, increased repair costs, and a compromised Sep 17, 2019 · How very not helpful. So a low current overnight charge may not bring the battery up to full charge. First time my 6 year old battery threw that lamp out it came and I threw a Optima Yellow top in there. So, I took this photo after leaving my car sit overnight and got 11. Oct 8, 2018 · Greetings and welcome to Prius Geekery! Because the 12v in a Prius doesn't power the engine starter and the HV Battery does, the criminals who bought Optima and moved the manufacturing plant to Mexico turned one of the highest rated batteries of the 1990's into total garbage and they get away with it because in Prius' case the 12v system needs no cold-cranking amps rating and functions much Here’s how a hybrid battery works and a list of bad hybrid battery symptoms to watch for. The table refers to an “Auxiliary Battery Low Voltage” troubleshooting procedure, which in turn refers to a more detailed on-vehicle When I owned a 2010 Prius, I kept a battery maintainer on the 12V battery on the weekends and when it got cold outside. If the battery sits in a vehicle that is not driven for some time in the winter, the battery will discharge and may freeze. Replaced hybrid battery approx 1 1/2 year ago with a new Toyota hybrid battery. First had it towed to a repair shop (that had replaced ABS 18 months earlier) and they said it was not an ABS issue, but a low voltage issue. Just maddening, as this is the reason we sold our last Prius -- except in that case it became necessary to replace the hybrid battery. The Prius battery operates best at temperatures between 20°C to 30°C (68°F to 86°F). Excessive heat can cause thermal runaway, potentially damaging the battery. Checked oil, slightly low, added small amount of oil. Now I keep a small rechargable jumper battery in my Prius. Your 12v battery probably needs replacing (~$200). It takes a while for your battery’s state of charge to go down, even if you’re using the car daily. 3v and that was out of the box. However, there are a few things you can look for at home. High temperatures can lead to chemical reactions that harm battery components. when the battery get old. May 25, 2025 · Before assuming the worst, it’s essential to check the coolant level in your Prius. Or, worse, your DC-DC converter is going out (~$1000). At 40% it's time to replace the battery because the drop from 40% is very fast. If the system is overcharging or undercharging the battery, or the battery is discharging at a high rate or has a parasitic drain, the life of the battery can be Jan 3, 2024 · It has happened at least 6-7 time with various intervals. Apr 18, 2020 · Something happening with my Prius Two (2017) model, as I try to start it. But the number might be 300-700 days, not tomorrow. Age: Prius batteries are designed to last, but if yours is over 10 years old, it might be time for a replacement. May 26, 2025 · Overheating can lead to battery damage and reduce its lifespan. I know many auto parts stores like Auto-Zone will do a free battery test that would be worth doing (though they're super sensitive and often call batteries "bad" a few years before they need to be replaced). The lower this reading the worse off your 12v battery is. Sometimes oil burning will have created excessive carbon in the cylinder and combined with low hv battery power can cause engine pinging when accelerating from a stop. Oct 28, 2021 · The car has low miles so the battery shouldn't need replaced, should it? I have been trying to plug it in after each trip so the hybrid battery should be charged. Prius app As that number goes up, the lifespan of battery pack goes down. When you encounter battery issues, here are some steps you can take: Jan 31, 2024 · Some noticeable symptoms that your Toyota hybrid’s battery may be malfunctioning include decreased fuel economy, the gas engine activating more frequently, difficulty starting the vehicle, the battery charge not lasting as long, warning lights illuminating on the dash, and strange noises from the battery area. This is a gen 2 Prius, you are referring to newer models. The car takes a long time to charge 4. The life of a battery is purely based on charge cycles and charge depth. Yours seems to just go down and stay there, if I read it correctly. It doesn't alway kic … read more 3 days ago · What Are the Step-by-Step Instructions to Repair Your Toyota Prius Hybrid Battery? To repair your Toyota Prius hybrid battery, follow a systematic approach that involves assessment, disassembly, replacement, and reassembly. Tested 12V battery it holds charge and gives 12v. Diagnosing and Testing a Dead 12v Prius Battery Using a Multimeter. To diagnose and test a dead 12v Prius battery, you can use a multimeter. Apr 1, 2013 · One problem with the Prius battery is it isn't a common battery. The issue is that this is an intermittent problem and hard to Jun 11, 2008 · This can cause the engine on behavior and can reduce power for low speed acceleration that you had with a good hv battery at low charge. While all Prius models use hybrid systems, some symptoms are specific to the Toyota hybrid battery family: Dimming Dashboard Lights 3 days ago · What Are the Step-by-Step Instructions to Repair Your Toyota Prius Hybrid Battery? To repair your Toyota Prius hybrid battery, follow a systematic approach that involves assessment, disassembly, replacement, and reassembly. Freezing and swelling from excess heat often result in an electrically "dead" battery that cannot be recovered and will require replacement. At that time I checked the battery and it showed up around 12. 6+ is a full charge and anything above 12v is enough not to worry how it will effect your Prius, electronics or otherwise. You can still get in with the mechanical key. Regular check-ups, lifestyle adjustments, and understanding the battery’s life expectancy can help extend Jul 6, 2017 · I have a 2007 Prius, approx 175,000 miles. At the first sign of strangeness on my 2008 I ordered a yellow top Optima on eBay and replaced it. Toyota Hybrid Battery-Specific Warning Signs You Should Watch. Battery Age Impact: The age of a Prius battery influences its overall performance. 6 miles. Sep 13, 2017 · 11. Mar 11, 2022 · Monitor "Voltage diff"on Dr. It certainly sounds like it could be battery related and 11. Shop Car Battery Now. That's the only warning the car gives you. Two days I ago when I tried to start my car, "Low 12V Battery Apply Parking Brake" message came on and I wasn't able to start it. The Optima was a lot cheaper than the OEM Toyota battery, and it was still fine at the ten year mark when I traded it in in November. Is it a faulty Battery? I've got a 2018 prius PHV. The Key Battery Low message on your Toyota Prius indicates that the key battery is running low and needs to be replaced. Rarely will a hv battery strand you. Nov 17, 2023 · Keep an eye on your vehicle’s performance and pay attention to any warning signs. Could it be due to only doing short runs to work? It's only a 5 minute drive of approx 1. If you suspect a faulty battery, take your hybrid to a service center to assess your battery’s health. 37. Guy was like these are the easiest cars to jump. Many hybrids, like the Toyota Prius, have special lights for battery issues. Solutions for Prius Battery Problems. 2. Addressing a dead 12v Prius battery early on can prevent further issues and ensure a safe driving experience. Ignoring these can cause more damage. So low that it's probably throwing the big red exclamation point upon boot up. If the system is overcharging or undercharging the battery, or the battery is discharging at a high rate or has a parasitic drain, the life of the battery can be Jun 11, 2008 · This can cause the engine on behavior and can reduce power for low speed acceleration that you had with a good hv battery at low charge. Also deep cycling the battery several times every 18 months will restore capacity and keep the voltage difference number low. The near-dead 35 Amp-hour Prius battery needs to be charged for 48 hours with a trickle charger (1 Amp rated). Fluctuations in the state of charge Aug 22, 2007 · 4. Jan 4, 2010 · Clear signs are the hv battery charge bar graph goes from decent to low at a traffic light. It says switch to park, 12v battery voltage low. Old Age. Locate the coolant reservoir, typically a translucent plastic container near the engine. But very obvious. Here are the biggest signs that your Prius has a low 12-volt battery: Failure to start:One of the most common symptoms of a low battery is that the car will fail to start. 9 in ACC is low. When the key battery is not replaced, eventually the key will stop working entirely. Mar 12, 2023 · A low aux battery could be the result of a damaged battery, parasitic drain, or loose battery connections. . May 6, 2025 · Monitoring these symptoms can help you address battery issues early, ensuring your Prius continues to operate efficiently and reliably. Aug 14, 2024 · A few days later it seems to start and run OK, so I drove a short distance until same symptoms appeared. Main Points to Consider: – Assess battery symptoms – Gather necessary tools – Disassemble the battery case Jul 2, 2014 · The usual symptoms of poor battery is for the SOC on the display to fluctuate from low purple to green and back. After fully charged and Jun 2, 2023 · > Gen 3 (2010-2015) Toyota Prius Forums > Gen 3 Prius Care, Maintenance & Troubleshooting > Low Battery Positive Voltage C1241 - Abs given in a Prius 2013 Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Bruce_Rmz , Sep 16, 2023 . 5 days ago · If the gas engine is running more often, even at low speeds, your Prius hybrid car battery may not be pulling its weight. Hybrid batteries typically last between 8 to 15 years. The large main traction battery and an auxiliary 12v battery. With a regular car, when your battery starts to die you can tell when you crank the starter. 12v goes back to life almost always except one time when I detached the neutral battery and reattached and it worked. Sep 22, 2019 · So, when the battery begins to go, your car reverts back to relying on the gas combustion engine as its source of power. Original Toyota 12V battery, so not surprising. Ensure the coolant level is within the designated range. If slip indicator comes back, might be bad 12v battery. Apr 8, 2024 · Key Battery Low Meaning. Yesterday had red triangle with ! And check engine light. It would be good to know what the definition of the delta SOC parameter was, somewhere in the software it should have a definition. The Fob Battery runs the doors and ignition functions If the door don't open or the car needs the key inserted to start, suspect the fob battery. Jan 5, 2025 · Well if you look under your hood here you will have no alternator You have that big silver thing right in front of the driver that says hybrid synergy drive that's an inverter that charges your alternator with a circuit on the very bottom of that inverter It also runs your air conditioning so it charges your 12 volt runs your high voltage air Oct 29, 2022 · I have a 2005 Toyota Prius 112,000 miles just repaired front end damage cannot get it to start and idle to charge hybrid battery. I've killed it sitting with heated seats on not in ready mode and had AAA come out. Batteries produce high voltages exceeding 200 volts, which is a shock for your engine. Doesn't even try to turn over which makes jumping take 2 seconds as it only needs a bit more voltage. To check for a bad 12v buy a Multimeter and check the 12v voltage after resting for a few hours. I replaced the 30 month old 12V auxiliary battery and still had low voltage codes, but not as many. For example, the National Renewable Energy Laboratory (NREL) finds that prolonged exposure to high temperatures can diminish a battery’s capacity by up to 15%. 9-12. Nov 5, 2023 · Hi all, I have 2019 Prius XLE with 24K miles. Jul 16, 2018 · In Toyota’s Repair Manual, for the message you quoted, the Problem Symptoms Table for the electronic shift lever system lists only “Auxiliary battery is discharged or voltage is low” as a suspected area. Jan 19, 2023 · Do you have Prius 12v battery issues? IS MY 12V BATTERY DEAD? Some of the symptoms of a dead or dying 12v battery are: Can’t unlock the car with key fob (if this is your only issue check battery inside the key fob) Car won’t start or lights flicker; Dim headlights/dome lights; Windows roll down slower than usual; Trunk won’t open Jun 30, 2023 · A 12-volt hybrid Prius battery lasts around 100,000 to 150,000 miles or 8 to 10 years of use. Symptoms of a low 12-Volt Battery. The 12v battery is almost 7 months old. Difficulty Starting: If your Prius takes longer than usual to start, the battery may be the culprit. I saw other threads on the same topic and they point to possible issues with the 12V battery. This morning, my 5 year old PP wouldn't start. It will take longer to turn over and sound weak. Nov 24, 2024 · The relationship between the age of a Prius hybrid battery and its longevity involves several factors, each contributing to overall battery health. It only flashes once but it's not part of the bulb check routine so it's noticeable. The car won’t hold a charge 3. 5 days ago · Overheating can significantly shorten a battery’s lifespan. If the battery fails to charge after a jumpstart, then tightening the battery connections and replacing a damaged battery will usually solve the Nov 23, 2019 · Disconnected the Suaoki immediately after starting the car, as per the instructions, and then left the car in P mode for 10 minutes (out of the garage!) to allow the traction Battery to feed a bit of charge into the low voltage Battery. It may go so low that the engine is lugging or pinging as you start moving again. #3 Salamander_King , Apr 5, 2019 Nov 20, 2024 · This is a common experience for many Prius and Prius Prime owners. I have talked to dealers, battery shops, hybrid shops, and Toyota themselves. 6v as normal. When I replaced the battery with a new Optima Yellow Top it read 12. On average, a car battery lasts about four to five years. Jul 18, 2022 · The best way to tell if a Prius battery is going bad is to take it to a Toyota dealership for a diagnostic test. Increased stops at the gas station are a sure sign the battery’s failing. If your Hybrid Battery is still the original there's a really good chance it could be going soon with it being that old Jul 4, 2009 · Under the 12 volt battery trouble scenario it only illuminates for a second and does not log a DTC. I get this message "Low 12-Volt Battery Apply Parking Brake Securely While Parking See Owner's Manual" (attached the picture). Take it to an auto part store that will do a free load test on the battery. Jul 6, 2018 · So I've made a video in the past of symptoms your bad hybrid battery might show, but it left out a lot of symptoms that I'm now experiencing with my battery Oct 29, 2024 · I've had a few instances of my 12v Battery being too low to start the car to give the ready lights when the traction Battery is engaged and wondered why this is. It seemed like the vehicle didn't take good care of the 12V battery, and the vehicle really suffers when that goes bad or dies. 12. Low Battery Charge: A low battery charge occurs when the energy stored in the traction battery drops below a certain Apr 4, 2019 · They usually gives off many warming symptoms like dim head lights, engine not turning over, etc. eqknwp mlmhml acuzr odjfuwt gbhhgf vag ygsvggs zddtswt yweolsfs dnkht